Billboard Bits serves up the best bite-sized nuggets of music news and gossip.

Katy Perry Strips, Teases Former Classmate

Katy Perry held a surprise performance at her old high school yesterday (Sept. 14) and after stripping out of a cheerleader outfit into something more revealing, the 25-year-old singer spotted "the most popular kid" in her class -- the same guy that "never wanted to date" her -- and appropriately dedicated her song "You're So Gay" to him. "What's up now?" Perry asked, looking over at the Dos Pueblos High School former student while plucking away at her guitar. Needless to say, the once popular kid is probably regretting his decision now. (TMZ)

The RZA Directing Russell Crowe in Kung-Fu Flick

Wu-Tang Clan mastermind the RZA will direct Oscar winner Russell Crowe in "The Man With The Iron Fist," a kung-fu film set to begin filming in Shanghai this December, according to E! RZA, who previously worked with Crowe in "American Gangster," says that Crowe will play "the baddest man alive… That man will knock you out." Quentin Tarantino and "Hostel" director Eli Roth are pegged as the cowriter and coproducer of the $20 million film. (E!)

Robyn To Perform on 'Gossip Girl'

Robyn will appear and perform on an upcoming episode of "Gossip Girl," Zap2It reports. The CW confirmed the appearance after the Swedish pop singer posted a photo from the New York set yesterday (Sept. 14). Robyn will sing "Hang With Me," off her just-released album "Body Talk Pt. 2," while stopping by as a guest at Blair's birthday party during the CW drama's fourth season. (Zap2It)

Matt & Kim's Third Album Due Nov. 2

Indie-pop duo Matt & Kim will release third full-length "Sidewalks" on Nov. 2 via new imprint FADER Label. The 10-track album will include first single "Cameras," which was released on Aug. 31. The group kicks off their fall
North American tour tonight (Sept. 15) in Syracuse, NY.

New PJ Harvey Album To Be Released Feb. 2011

Longtime PJ Harvey collaborator Mick Harvey revealed on his Myspace blog a few weeks ago that PJ will release new material this February. "There will be extensive touring commitments with my dear friend Polly (PJ) after the release of her new album in February 2011," said Mick. ( TwentyFourBit)

Michael Jackson's Cemetery Charging Fans $3 to Deliver Gifts

Effective immediately, Forest Lawn Cemetery, the burial site of Michael Jackson's body, will enact a $3 fee for fans wishing to leave flowers for the King of Pop inside his private mausoleum. Other gifts, such as teddy bears and posters, will not be permitted inside of the mausoleum -- much like fans themselves. Currently, the cemetery staff takes the flowers left for MJ to the mausoleum, since fans cannot. ( TMZ)

(Reporting by Jason Lipshutz, Jillian Mapes and Mariel Concepcion)